Which function forms an arithmetic sequence when x = 1, 2, 3, ...?

1 answer:

5 0

When we have power function or exponential, or then we have a/x, then functions are not going to give arithmetic sequence, because an arithmetic sequence it is really a linear function when x are natural numbers,

so we need to check only A
f(x)=- x/3 +5

x 1 2 3 4 5
y 14/3 13/3 12/3 11/3 10/3 arithmetic difference is -1/3

so the answer is A

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